West Haverstraw, NY rainwater: 39,160 gallons off a roof
West Haverstraw, NY: gallons off the roof each year
39,160gallons a year
That is a 1,500 sq ft asphalt roof under West Haverstraw, NY's normal 49.3 inches of rain, about 795 gallons for every inch that falls.
In West Haverstraw, NY a single barrel does most of the work. Storms come often enough that a small tank refills before it runs dry, and a bigger one would mostly sit full.
Rainfall: NOAA 1991-2020 climate normals, the Peekskill 0.4 N station (6.9 mi away). West Haverstraw, NY ranks 21st wettest of the 90 cities covered in New York.
Month by month in West Haverstraw
| Month | Rain (in) | Off the roof (gal) | Garden shortfall (gal) |
|---|---|---|---|
| Jan | 3.55 | 2,822 | |
| Feb | 3.01 | 2,392 | |
| Mar | 4.22 | 3,354 | |
| Apr | 4.01 | 3,187 | 42 |
| May | 3.98 | 3,163 | 46 |
| Jun | 4.40 | 3,497 | |
| Jul | 4.73 | 3,759 | |
| Aug | 4.31 | 3,426 | 5 |
| Sep | 4.65 | 3,696 | |
| Oct | 4.45 | 3,537 | |
| Nov | 3.57 | 2,837 | |
| Dec | 4.39 | 3,489 |
Jul is the wettest month (4.73 in, 3,759 gal off the roof); Feb the driest (3.01 in). Garden shortfall is what a 200 sq ft vegetable bed needs beyond the rain that lands on it, April to October.
What size rain barrel for West Haverstraw
Best fit: one 55-gallon barrel, which delivers about 71 gallons to the garden in a normal year (75.9% of its need).
If you buy one, a 55-gallon barrel with a downspout diverter is the whole job. Check that the overflow points away from your foundation, because most of West Haverstraw's roof water will pass straight through it.
| Tank | Water used (gal/yr) | Spills over (gal/yr) |
|---|---|---|
| 55 gal | 71 | 37,859 |
| 110 gal | 71 | 37,859 |
| 165 gal | 71 | 37,859 |
| 275 gal | 71 | 37,859 |
| 550 gal | 71 | 37,859 |
| 1,000 gal | 71 | 37,859 |
| 1,500 gal | 71 | 37,859 |
| 2,500 gal | 71 | 37,859 |
| 5,000 gal | 71 | 37,859 |
Simulated storm by storm through a normal year using the station's count of days with 0.1 in or more of rain each month.
Is rainwater collection legal in New York?
No statewide rainwater harvesting regulations; check county for local incentives
From the 2015 (Pacific Northwest National Laboratory report 24347); not yet re-checked against current law, so check with your state water agency before building anything large. Source